// server.js
// where your node app starts

// init project
var express = require('express');
var app = express();

// enable CORS (https://en.wikipedia.org/wiki/Cross-origin_resource_sharing)
// so that your API is remotely testable by FCC 
var cors = require('cors');
app.use(cors({optionSuccessStatus: 200}));  // some legacy browsers choke on 204

// http://expressjs.com/en/starter/static-files.html
app.use(express.static('public'));

// http://expressjs.com/en/starter/basic-routing.html
app.get("/", function (req, res) {
  res.sendFile(__dirname + '/views/index.html');
});

// your first API endpoint... 
app.get("/api/hello", function (req, res) {
  res.json({greeting: 'hello API'});
});

app.route("/api/timetamp")
  .get((req, res) => {
    res.json({
      "unix": new Date().getTime(),
      "utc" : new Date().toUTCString()
    });
});

app.route("/api/timetamp/:datetime")
  .get((req, res) => {
    let date_string = req.params.datetime;
    let unix, utc
    if(date_string.includes("-")) {
      unix = new Date(date_string).getTime();
      utc = new Date(date_string).toUTCString();
      if(unix && utc){
        res.json({
          "unix": unix,
          "utc": utc
        });    
      }
      else{
        res.json({
          "error":"Invalid Date"
        });
      }
    }
    else {
      unix = Number(date_string);
      utc = new Date(unix).toUTCString();
      if(unix && utc){
        res.json({
          "unix": unix,
          "utc": utc
        });    
      }
      else{
        res.json({
          "error":"Invalid Date"
        });
      }
    }
  });



// listen for requests :)
var listener = app.listen(process.env.PORT, function () {
  console.log('Your app is listening on port ' + listener.address().port);
});